秦汉时期，为了防止匈奴的进犯，在一些边关要塞广种（）
下列属于狭义的文化产品的是（）
只有写成典籍或成为口头流传的语言形式，才是（）
下列不属于文化事象的是（）
原始的巫术，生产领域中的行业禁忌等属于（）
《乐》在古代的失传，我们今天已经无法系统了解《乐》的内容，这说明（）的重要性
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一、古代保护自然方面的作为
在课上我们谈到过，榆树耐干旱，耐贫瘠，且根系发达，所以适合种在边关地区
多做几道
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